I'm using PICO2W in IDE arduino with release 5.3.0 I found a strange behaviour with the "attachInterrupt()" function when running on 2 cores programs for pico2. Every thing runs OK when running one 1 ...

is used by every other Arduino package I've used/looked at. I assume this variation is required by features of CH32V parts. There must be some workaround that I am not smart enough to work out. If I ...